KR20020089047A - Apparatus for erasing a dust of an air conditioner - Google Patents

Abstract

PURPOSE: A device for removing foreign matters of air-conditioning system for bus is provided to improve workability and to keep cooling performance steady. CONSTITUTION: A device comprises a duct(20) placed on a roof panel of a bus and having an evaporator(21), a condenser and an air blower(24) built therein and a return grill(23) around the evaporator through which air flows in from an inside of the bus; a side duct(30) extending from both sides of the duct and having a nozzle placed on a bottom thereof to be fluidically connected with the inside of the bus; a filter placed on an outside of the evaporator and preventing infiltration of foreign matters contained in air flowing in through the return grill into the evaporator; and a foreign matter removing device(100) placed in the duct to automatically remove foreign matters sticking in the filter.

Description

Foreign substance removal device of bus air conditioner {APPARATUS FOR ERASING A DUST OF AN AIR CONDITIONER}

The present invention relates to an air conditioner for a bus, and more particularly, to a removal device for removing contaminants trapped on a filter located in front of an evaporator.

In general, when the air conditioner of a large bus is viewed, as shown in FIG. 1, a duct 20 having a space provided therein is provided on a roof panel 10 of the bus. An evaporator 21, a condenser 22, a blower 24, and the like are installed in the space part of the space, and a return grill in which air flows in communication with the inside of the bus is located at a position adjacent to the evaporator 21. grille 23 is installed.

Side ducts 30 extend from both sides of the duct 20 so as to correspond to the left and right side parts of the bus, that is, the passenger seat, and the side ducts 30 have nozzles for discharging air. nozzle 31 is provided.

On the other hand, the outer front of the evaporator 21 is to block foreign matter in the air flowing through the return grill 23 into the evaporator 21, a filter (filter; 40) is provided.

In the conventional air conditioner configured as described above, the air is cooled through the circulation cycle of the refrigerant to the evaporator 21 and the condenser 22 in the compressor and the duct 20 in the engine room (not shown), and the side duct 30 by the blower. The discharged air is discharged into the bus through the nozzle 31, and the discharged air cools the inside of the car and is sucked onto the duct 20 through the return grill 23 to form a circulation cycle.

In addition, the foreign matter in the air sucked into the return grill 23 is filtered and collected by the filter 40 located in front of the evaporator 21.

On the other hand, in collecting foreign matter through the filter 40 in this way, when a certain time elapses, a lot of foreign matter is collected on the filter 40, the air circulation is not smoothly made accordingly, the cooling performance is lowered The problem is caused.

Therefore, the driver or the worker separates the return grill 23 and the filter 40 in sequence, and removes the foreign matter on the filter 40 through water or air and reinstalls it.

However, in such a conventional air conditioner, the removal and installation of the return grill 23 and the filter 40 is accompanied with a certain time elapsed in order to remove the foreign matter on the filter 40, thereby degrading workability and use. Problems that result from inconvenience are inherent.

In addition, when the cleaning of the filter 40 is made late by the operator or the operator by experience by mistake or the like, a problem occurs that causes a significant decrease in cooling performance.

The present invention was created in order to solve the above problems, there is no need to separate and clean the return grill and filter from time to time to improve workability, and also by removing the foreign matter automatically according to the degree of collection of foreign matter is always constant It is an object of the present invention to provide a debris removing device of an air conditioner for a bus that can obtain cooling performance.

In order to achieve the above object, the present invention is provided on the roof panel of the bus, an evaporator, a condenser and a blower are installed therein, and a return grille in which air is introduced from the inside of the bus is provided at a portion adjacent to the evaporator. Ducts; A side duct extending from both sides of the duct and provided with a nozzle communicating with the inside of the bus at a bottom surface thereof; A filter provided on an outer surface of the evaporator and blocking foreign substances in the air introduced through the return grill from being introduced into the evaporator; It is provided in the duct, foreign matter removal means for automatically removing the foreign matter attached to the filter; characterized in that consisting of.

1 is a cross-sectional view of a roof panel employing a general bus air conditioner.

Figure 2 is a block diagram conceptually showing a foreign material removal device of the air conditioner according to the present invention.

3 is a block diagram conceptually showing a foreign material removal structure of the conventional air conditioner.

<Description of Signs of Major Parts of Drawings>

10 roof panel 20 duct 21 evaporator

22 condenser 23 return grill 30 side duct

31: nozzle 40: filter

100: foreign matter removal means 110, 120: first, second pressure sensor

130: driving motor 140: scrap bar

Referring to FIG. 1 and as shown in FIG. 2, the present invention is roughly divided into a duct 20, a side duct 30, a filter 40, and a foreign material removing means 100.

The duct 20 is provided on an upper surface of the roof panel 10 of the bus, and a space part is provided therein, and an evaporator 21, a condenser 22, and a blower 24 are built in the space part. .

In addition, a return grill 23 is provided at a position adjacent to the evaporator 21 to allow air to flow from inside the bus.

The side duct 30 is formed integrally extending from both sides of the duct 20, and is positioned to correspond to the side of the bus, that is, the boarding seat, and in particular, a nozzle on the bottom surface to discharge air toward the boarding seat. nozzle 31 is provided.

The filter 40, which is interposed between the evaporator 21 and the return grill 23, performs a function of filtering and collecting foreign matter in the air flowing into the evaporator 21 through the return grill 23. .

The foreign matter removing means 100 has substantially the features of the present invention, and performs a function of having a constant cooling performance by automatically removing foreign matters that are collected by being filtered on the filter 40.

Looking at the detailed structure of the foreign material removing means 100, largely divided into 1, 2 pressure sensors (110, 120) and the drive motor 130 and the scrap bar 140.

The first and second pressure sensors 110 and 120 are installed on the inner surface of the evaporator 21 and the duct 20 adjacent to the return grill 23, respectively, and detect pressure inside and outside the evaporator 21. Perform the function.

The driving motor 130 is connected to the first and second pressure sensors 110 and 120 described above, and is driven when the pressure difference is generated between the first and second pressure sensors 110 and 120.

That is, the driving motor 130 is turned on when the internal pressure of the evaporator 21 is less than the external pressure, and is off when the drive motor 130 is reversed.

And it will be preferable to use the battery power of the bus as the drive source of the drive motor 130.

The scrap bar 140, which is interlocked by the drive motor 130, is slid along the surface by the operation of the drive motor 130 while being in contact with the outer surface of the filter 40 to the surface of the filter 40. It removes trapped foreign matter.

At this time, in removing the foreign matter through the scrap bar 140, it may be desirable to provide a container for storing the removed foreign matter separately in the lower portion of the filter 40 to remove after a predetermined time.

According to the present invention configured as described above, when the air is circulated according to the operation of the air conditioner, that is, the cool air is discharged to the passenger seat through the nozzle 31 of the side duct 30, and the inside of the return grill 23 is cooled. Through the circulation process of being cooled again while being introduced into the evaporator 21 through.

At this time, foreign matter in the air is filtered through the filter 40 and collected while the air is introduced into the evaporator 21 through the return grill 23.

On the other hand, if a certain time elapses in the process of filtering and collecting the foreign matter through the filter 40 in this way, the air is not smoothly introduced into the evaporator 21 by the foreign matter collected in the filter 40.

In this way, when the air flow is not smooth, the pressure inside the evaporator 21 drops relative to the outside, and the first and second pressure sensors 110 and 120 detect this.

When the first and second pressure sensors 110 and 120 detect the occurrence of a pressure difference inside and outside the evaporator 21, the driving motor 130 is turned on and operated, and at the same time, a scrap bar connected to the driving motor 130 is provided. 140 removes the foreign matter collected on the surface while being transported along the surface of the filter 40.

When the foreign matter on the surface of the filter 40 is removed by the scrap bar 140 as described above, the pressure difference between the inside and the outside of the evaporator 21 becomes constant, and thus the driving motor 130 is turned off, thereby operating the scrap bar 140. Is stopped.

Therefore, by maintaining a constant pressure inside and outside the evaporator 21, it is possible to improve the cooling performance through the smooth circulation of air.

As described above, the present invention can filter and collect the foreign matter in the air flowing through the return grille with a filter, and at the same time, it is possible to automatically remove the foreign matter according to the amount of the foreign matter through the foreign matter removing means.

Therefore, there is no need to remove the foreign matter by separating the return grill and the filter frequently as in the prior art, which improves workability, and improves cooling performance by being able to automatically remove the foreign matter according to the amount of foreign matter collected. There is an advantage to this.

Claims (2)

A duct provided on a roof panel of the bus, having an evaporator, a condenser, and a blower installed therein, and a return grill provided with air return from the inside of the bus in a portion adjacent to the evaporator; A side duct extending from both sides of the duct and provided with a nozzle communicating with the inside of the bus at a bottom surface thereof; A filter provided on an outer surface of the evaporator and blocking foreign substances in the air introduced through the return grill from being introduced into the evaporator; Contaminant removal device of the air conditioner for the bus, characterized in that provided in the duct, foreign matter removal means for automatically removing the foreign matter attached to the filter. 2. The apparatus of claim 1, wherein the foreign material removing means comprises: first and second pressure sensors provided on an inner surface of the evaporator and a duct adjacent to the return grill, and measuring a pressure difference between the inside and the outside of the evaporator; A driving motor connected to the first and second pressure sensors and turned on when a pressure difference is generated between the first and second pressure sensors, and off when a pressure difference is not generated; And a scrap bar contacting the outer surface of the filter to remove foreign substances on the outer surface of the filter while being slid along the surface of the filter by turning on the driving motor.